What Factor Separates Gardner's Concept of Intelligence from That of Sternberg's

What factor separates Gardner's concept of intelligence from that of Sternberg's theory?

A) Sternberg's elements that comprise his triarchic theory of intelligence are connected, whereas Gardner's are separate and independent.
B) Sternberg's theory is too comprehensive , whereas Gardner's is more simple. .
C) Sternberg's elements are independent of each other, whereas Gardner's elements depend on the development of each element.
D) Sternberg's theory is untested, whereas Gardner's theory is universally accepted.